I'm using Centos 7 and have installed webpagest v2.19. Film strip & waterfall seem to be working but not the video playback. The video is created on the server, however, I'm not able to play it on the browser. I can't even download the video from that page.

The test agent has wptdriver and urlblast running

I tried 'scp' the video to my computer and the video played fine with VLC player.

Could someone help me figure this out?
I'm unable to reach the video resource as my browser keeps spinning.
But as specified above, the video links are correct within the html.

How can I debug this? Is it a permission issue? Host machine is a centos 7 has a user that is 'centos', while the container runs with user 'www-data' (as specified in the webpagetest source code Docker file)